Base.



1. P. RICHARDSON.

BASE.

APPLICATION FILED SEPT. 13| 1915.

1,185A38. y dPtented.my 30,1916.

2 SHEETS-SHEET 2.

/8 Z3-27g 7 y 5 A y Y 'l *d70 THB coLuMBxA PLAHoanAPH C0.. WASHINGTON. n. c.

JAMES r. RICHARDSON, or MANILA, rHILIPPI'NEisL-Arms BASE.

Specification of Letters Patenti.

Patented Mayso, 1916.

Application filed September 13, 1915. Serial No.'50,4.52. 1 l

To all whom t may cof/cern Be it knownthat I, JAMES P. R1CHARD- soN', a citizen of the United States, residing at Manila, in the Territory of Philippine Islands, have invented certain new and useful Improvements in Bases; and I do hereby declare the following to be afull, clear,y and eXact description ofthe invention, such as will enable vothers skilledin the art to which it appertains to make vand use the same.

This inventionrelates to improvements in bases for the various types of printing plates and to the method of producing same and is particularly designed Vas an improvement on the base describedand claimed in my copending application filed February 4, 1915, and serially numbered 6117.

Itis my purpose to provide an improved base formed of a pluralityl of independent units which are graduated in size by a table of measurements so as to enable them to be readily combined to produce a desired standard size lbase. I l

It is my further purpose to provide a base which will bevproof against warping, whose surface is unaffected by swelling of the individual units as a. result of absorbingv moisture, which has a complete metal binding around all its sides making perfect surfacesv for lock-up with other type matter and material.

It is also my purpose to provide an improved process for forming bases with mortises of any dimensions or conguration and with a complete metal wall without the necessity of cutting or piercing the base.

With these and other purposes in view the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully described and particularly pointed out in the appended claims.

In describing the invention in detail reference will be had t the accompanying drawings wherein like characters of reference denote corresponding parts in the several views, and in which- Figure 1 is a view in elevation of a base constructed in accordance with the invention; Fig. 2, an edge view of same; Fig. 3, a horizontal section through the base, Fig. 4, a horizontal section through one of the corner units; Fig. 5, ar horizontal section through one of the intermediate edge units; Fig. 6, a horizontal section through one of the interior units; Figl'?, a view in elevation of ,a base constructed with mortises and before the blanks are removed; Fig. 8, a view l similar to Fig. 7 after the blanks which form the mortises are removed, and Fig.v 9,aview in elevation of a base before theadjacent edges of the units are cut away to dispose said edges in spaced relation.

Referringto the drawings and particularly to Figs. l, 2, 3, '4, 5, 6 and 9 itv will be seen that the base is formed of a plurality of wooden units A of three types namely corner units 10, intermediate edge units l1 and interior unit-s 12. The corner units have all of their side edges provided respectively with grooves 13, the grooves in the outer side edges being of greater depth than the grooves in the inner side edges. The intermediate edge units 11 also having their side edges provided with grooves 14 andthe 75 groove in theouter edge of these'unitsis of greater depth than the remaining grooves. Likewise the interior units 12 have their side edges provided with grooves 15 all of equal depth. By providing thel relatively deep grooves 13 and` 1.4 a strong complete metal binding is provided around the base as will hereinafter appear. It will be noted that the various grooves in the units lare of greater width than depth and as a result greater strength with less metal filler in the finished .base `will be had. The bases of allV the grooves 13, 14 and 15 are provided with recesses 16 which are also adapted to receive the metal filler to be hereinafter referred to. In forming the base the requisite number of units A are set up in the angle of a square and bearers placed around three sides of the assembled units. The casting box is then closed and molten metal poured into the various grooves and recesses previously described with the result that a base similar to that shown in Fig. 9 is formed. In vthis way a rough unfinished base is produced but it could be subsequently planed and trimmed and a strong serviceable base would be the ultimate result. It has been found however that the wooden units in a'base similar to that shown in Fig. 9 on absorbing more or less moisture will swell and where the edges of the units come in contact small ridges will form causing an uneven surface. As a result of this condition I nd it advantageous to subject the base to additional treatment and to this end I cut grooves between the units down to the metal filler as clearly shown at 17 in Fig. l. These grooves 17 form a space to allow for the swelling without aecting the surface. In th is manner I positively obtain a base that is not affected by warping or swelling.

It will be noted that by making the grooves in the various units relatively wide the reinforcing qualities of the metal filler or binder are materially enhanced with the use of less metal than was necessary in the structure set forth in my previous application. It willalso be noted that by providing the recesses 16 I prevent the units 'becoming detached, especially the corner units.

In forming bases o-f irregular shape and with inortises I employ blanks 18 as clearly shown in Figs. 7 and 8. These blanks are assembled with the units in the desired manner and when the metal is poured it will surround the blank and upon removal of the latter either an opening or an irregular edge will be provided having a metal face.

While I have illustrated and described one form of carrying the invention into practice it will be noted that various changes can be resorted to without departing from the spirit of the invention as set forth in the appended claims.

What is claimed is l. AV printing plate base comprising a non-metallic body formed of a plurality of independent sections each of which has communicating grooves in the various faces, said grooves being of greater width than depth and theV grooves' of one section being L disposed in registration with the grooves in.

adjacent sections, and a metallic filling in said grooves.

2. `A printing plate base comprising a non-metallic body formed of a plurality of independent sections each of which has communicating grooves formed in the various faces, the grooves of one section being disposed in registration with the grooves in adjacent sections, and a metallic lling in said grooves, the adjacent edge of the section being cut away to dispose same in spaced relation.

3. A printing plate base comprising a non-metallic body formed of a plurality of in'dependent'sections each of which has communicating grooves formed in various faces and recesses opening through the bottoms of said grooves, the grooves of one section being disposed in registration with the grooves in adjacent sections, and a metallic filling in said grooves.

4. The method of forming printing plate bases consisting of providing a plurality of sections with communicating grooves in various faces and with recesses opening through the bottom of said grooves, securing said sections together edge vto edge with the grooves of one section in registration with corresponding grooves of adjacent sections, filling said grooves with metal, and then cutting away the adjacent edges of the sections to dispose said edges in spaced relation.

In testimony whereof, I affix my signature, in the presence of two witnesses.

JAMES P. RICHARDSON.

IVitnesses Y A. L. WooLr,

JOHN H. MGINERNY.

@epica o?? thla patent may be obtained for five cents each, by addressingthe Commissioner of `l?ateata. Washington, D. G. 

